Validation of sea ice concentration - American sector
Reference date: 2025-09-25
Model: GLO MFC - NEMO
Data source: OSI SAF N.H. sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-19:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16201 |
4837 |
234 |
188 |
13 |
0 |
0 |
0 |
| OW |
594 |
3914 |
458 |
730 |
68 |
3 |
0 |
0 |
| VODI |
4 |
57 |
64 |
713 |
654 |
69 |
0 |
0 |
| ODI |
0 |
13 |
11 |
110 |
1104 |
1684 |
120 |
0 |
| CDI |
0 |
2 |
1 |
4 |
266 |
3549 |
847 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1773 |
6098 |
1459 |
|
|
Date: 2025-09-21:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15894 |
5240 |
204 |
181 |
7 |
0 |
0 |
0 |
| OW |
610 |
3576 |
280 |
662 |
305 |
3 |
0 |
0 |
| VODI |
0 |
98 |
73 |
481 |
601 |
119 |
1 |
0 |
| ODI |
0 |
7 |
8 |
130 |
932 |
1031 |
76 |
1 |
| CDI |
0 |
0 |
1 |
10 |
407 |
3762 |
502 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
2892 |
5890 |
1856 |
|
|
Date: 2025-09-23:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16348 |
4931 |
146 |
117 |
1 |
0 |
0 |
0 |
| OW |
612 |
3462 |
293 |
596 |
266 |
8 |
0 |
0 |
| VODI |
0 |
100 |
70 |
459 |
611 |
111 |
6 |
0 |
| ODI |
0 |
5 |
6 |
118 |
883 |
638 |
35 |
0 |
| CDI |
0 |
0 |
0 |
8 |
316 |
3148 |
1559 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1446 |
7688 |
1853 |
|
|
Date: 2025-09-25:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16150 |
5186 |
122 |
97 |
11 |
0 |
0 |
0 |
| OW |
127 |
3657 |
266 |
609 |
192 |
5 |
0 |
0 |
| VODI |
0 |
73 |
62 |
463 |
588 |
134 |
1 |
0 |
| ODI |
0 |
4 |
5 |
132 |
754 |
627 |
18 |
0 |
| CDI |
0 |
0 |
0 |
9 |
222 |
2450 |
747 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1551 |
8624 |
2955 |
|
|
Date: 2025-09-27:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15890 |
5426 |
126 |
95 |
8 |
0 |
0 |
0 |
| OW |
68 |
3311 |
278 |
424 |
248 |
26 |
0 |
0 |
| VODI |
0 |
76 |
64 |
373 |
419 |
216 |
65 |
0 |
| ODI |
0 |
1 |
0 |
77 |
431 |
521 |
151 |
0 |
| CDI |
0 |
0 |
0 |
1 |
142 |
1475 |
905 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
935 |
8982 |
5108 |
|
|
Date: 2025-09-29:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15323 |
5865 |
162 |
141 |
69 |
5 |
0 |
0 |
| OW |
0 |
2065 |
307 |
868 |
270 |
38 |
0 |
0 |
| VODI |
0 |
48 |
43 |
461 |
385 |
170 |
11 |
0 |
| ODI |
0 |
1 |
2 |
92 |
507 |
348 |
57 |
0 |
| CDI |
0 |
0 |
0 |
1 |
247 |
1357 |
322 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
1161 |
11841 |
3671 |
|
|
Date: 2025-10-01:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15139 |
5889 |
283 |
297 |
11 |
0 |
0 |
0 |
| OW |
0 |
1341 |
297 |
779 |
234 |
83 |
0 |
0 |
| VODI |
0 |
51 |
45 |
306 |
426 |
61 |
3 |
0 |
| ODI |
0 |
6 |
6 |
175 |
587 |
276 |
10 |
0 |
| CDI |
0 |
0 |
2 |
17 |
433 |
1497 |
114 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
64 |
1914 |
7052 |
8444 |
|
|
Date: 2025-10-03:
| Best estimate |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14420 |
5690 |
423 |
564 |
43 |
0 |
0 |
0 |
| OW |
0 |
842 |
242 |
758 |
443 |
10 |
0 |
0 |
| VODI |
0 |
45 |
46 |
289 |
518 |
186 |
14 |
0 |
| ODI |
0 |
7 |
6 |
74 |
328 |
357 |
54 |
0 |
| CDI |
0 |
0 |
2 |
6 |
188 |
1470 |
375 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1457 |
9151 |
7816 |
|
|
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